Concrete floor construction



PKKUHNE- CONCRETE FLOOR CONSTRUCTION.

APPLICATION HLED 1AN.28.1919.

Patented Feb. 3, 1920.

2 SHEETS-SHEET I- A 6601' we P. KUHNE.

CONCRETE FLOOR CONSTRUCTION.

APPLICATION FILED JAN. 28, 1919.

1 ,329,978, Patented Feb. 3,1920.

. 2 SHEETS-SHEET 2- J0 I! 4 j i I flu 672227 .9 Am y PAUL 'KUHNE, on BIRMINGHAM, ALABAMA.

' CONCRETE FLOOR CONSTRUCTION.

To all whom it may concern Be it known that I, PAUL KUI-INE, a cltizen of the United States, residing at 2300 Orange avenue 8., Birmingham, in the county ofJe-iferson and State .of Alabama, have invented certain new and useful Improvements in Concrete Floor Constructions;

of which the following is a specification.

This invention relates to an improvement in concrete floorconstruction where hollow spaces are formed between the beams, the

invention being more particularly directed to the steel forms about which the concrete is poured toprovide such hollow spaces.

As heretofore constructed, the forms have been so formed as to require theapplication of the usual metal lathing to close the space provided by the forms and to provide for the application ofthe ceiling, thus requiring the additional material of such lath-ing and the time and labor in applying same.

The present improvement is. directed to comblning the lathing with and as a part of the form, and so constructing the com bined form that the concrete, when poured, will fill between projections of such lathing, and thus, when. the centering is removed,

leave a com letely inclosed space, and a comparatively smooth surface for the application of the ceiling.

. Another object is the construction of the form that it will be completely reinforced, and the utilization of certain of the reinforcing means as a support for the usual metal bars to be embedded in and reinforce the concrete beams formed between the,

forms. The invention in the preferred form is shown in the accompanying drawings, in which Figure 1 is a sectional view of a portion of a floor, with the improved forms in place.

Fig. 2 is a plan, partly broken out, of the A Specification of Letters Patent.

'upwardly-projecting meeting portions.

PatentedFeb.3, 1920.

Application filed January28, 1919. SezfialfNo. 273,528.

forms thus. provide open spaces between spaced concrete beams in the completed floor structure. v

The improved form is made of steel, or

the like, having a cross sectional dimension required, and is to begiven any desired shape- As. shown, the strip forming the structure is bent in a form having a straight bottom 1, comparatively straight side walls 2, and a roundedtop portion 3. -The strip is formed over forming and staying bars or rods 4, shaped to correspond with the shape of-the sides and top, and preferably tied to the strip, as at 5. Any desired number of such bars 4L may beused, in order to secure the desired rigidity of the form. r

The bottom of the form is constructed to resemble the usual metal lathing, and this constitutes-one of the important features of the present invention. For this purpose the bottom of the form is provided. at regular intervals with suitable incisions, dividing "thematerial so thatthe same may be bent downwardly from the bottom as spurs 6, and walls 7 The formation is such that the spurs are of greater length than the side walls, as clearly seen in Fig. 5, so that the spurs may rest upon the centering and support the bottom of the form above the same; The concrete when poured will thus flow around the spurs and into the openings and between the walls 7 A layer of concrete is thus provided. which is interlocked with the bottom of the form, which closes the space of the form, and which provides a surface on which the finished ceiling may be readily applied.

The side walls of the form are preferably corrugated, as at 8, or may be strengthened to preserve theirrigidity in any other de sired manner. The side edges of the strip forming the form, are preferably extended upwardly from the central line of the top, as at 9, and the ends interlocked at 10. Rivets or other fastenings 11, secure the A T-head isv thus formed which when embedded in the concrete, absolute y prevents the sagging of the form.

The respective forms are arranged in spaced relation, so that the concrete mayfill the space between such forms to provide the necessary floor beams. The present invention contemplates the use of interbracing and fastening means for the adjacent forms, in inverted U-bars 12 and 13, arranged as lathing forceiling purposes, and the form itself provides a more rigid structure and one having advantages over forms heretofore used for this purpose.

Having thus described the what is claimed as new is r 1. A sheet metal form for .concrete floor invention,

construction having a bottom out to form openings, the material of the bottom .within the plane of the opening being in part bent downwardly to form wall portions extending below and at an angle to the-plane of the bottom and in part bent downwardly to form spurs extending belowthe bottom and below the lower portions. p 7

' 2. A-sheet metal form for concrete floor constructions having a bottom slitted to leave side and endportions divided from each. other and connected with the bottom,

said side portions being bent downwardly edges of the wall from and at an angle to the bottom and the :end portion-being bent downwardly below the bottom, the bending of the side and end portions forming an opening in the bottom within the plane of the bent portions.

3. A form for concrete floor construction comprising a sheet metal hollow body. having a bottom, substantially" parallel side walls, a rounded top, themeeting edges of such rounded top being interlocked above the top to form a rib, and stay bars'within and bearing against the sides and top of the body, the terminals of such bars resting on the bottom, said bottom being formed with. openings having side wallsproj ecting below the plane of the bottom and end walls, form- 7 ing spul'sprojecting belowthe plane of the bottom and below the lower edges of the side walls. V r i 7 4%. A form for concrete floor constructions comprising a sheet metal hollow body hav-' ing a bottom substantiallyparallel side walls, and a rounded top, the meeting edges of the sheet forming the body being projectedabove the rounded top. and longitudinally thereof as a rib, and staybars within and bearing against the body, the terminals of said bars resting on the bottom of. the

body and the intermediate 'portionsof such bars bridging the meeting edges or" the body V forming strip; V y

In testimony whereof I'aflixmy signature. PAUL KUHNE. 

